What are the four bases found in DNA and how do they bond.

There are four DNA bases, Adenine (A), Cytosine (C), Guanine (G) and Thymine (T).
On each strand of DNA, the DNA bases are connected by phosphodiester bonds, to form a long chain.
These long DNA strands are paired and mirror each other to form the DNA double helix. The DNA bases pair to their mirrored base in two ways: A-T or C-G.
These paired bases between the DNA strands bond by hydrogen bonds. There are two hydrogen bonds between A-T and three between C-G.